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' GIEBEL AND F. H. Zl-MMERMAN. METHOD OF MANUFACTURING DIES AND A HUB 0R SINKERIHEREFOR.

I APPLICATION FILED MAY 16, 1919.

Reissued Apr. 6, 1920.

UNITED s'rarns rnrnrir unripe JULIUS GIEBEL AND FREE 1 1. ZIMMERNIAN, 0F FREMONT, 01-1350; SAID GI EBEL ASS IGNGR TO THE .HERBRAND COIJIPANY, 0F FREMONT, OHIO.

i METHOD OF MAN UFAU'IU 1331i G DIES AND A HUB 0R SINKER THEREIEUR;

Original No. 1,247,524, dated To all whom. it may concern Be it known that we, JULIUS GIncnL and Faun H. ZIMMERMAN, hoth citizens of the United States of America, residing at Fremont, in the county of Sandusky and State of Ohio, have invented a certain. new and useful Method of liclanufacturing Dies and a Huh or Sinker Therefi'ar, of which the f0llowing is a specification.

This invention relates to the making of dies and particularly-to "the making of drop forging dies, and also to the construction of hubs, sinkers orcmaster formers for use in sinking or forming a design in intaglio upon. the surface of a suitably prepared block of metal.

The object of this invention is the provision of an improved method of making dies particularly for use in drop forging, and also the provision of an improved huh, sinker or master former for making such dies, whereby a material saving in. time, labor, material and expense is effected in the making of such dies, and the liability of mistakes and errors minimised, thereby enabling the employment of skilled labor in the manufacture of such dies to be in some measure dispensed with. Further advantages of our invention are that it makes every impression uniform, simplifies the finishing of the die and insures sharp corners or edges on the finished die.

Further ohjects and advanta es of the invention will be apparent to persons siriiied in the art from the foilowing description thereof In the accompanying drawings,

Figure 1 is a plan view of a huh or sinker constructed in accordance with the inven tion. Fig. 2 is a side elevation thereof. Fig, 3 is a transverse vertical section. thcre-- through, Fig. 4L is a sectional. viewof a die formed-by the tool hef -re the surface of the same is dressed off. ig. 5 is an enlarged section of the hub or sinker taken on a line 3-3 inFig.. 1, and in operativerelation to -a "plain die block in similar section.- Fig. '5

- is a similar View thereof after the huh or sinker has been lowered to sink its impression into the die block and again raised, and 7 is a section of the die hloch faced off to the depth of the usable condition.

Like reference characters designate corregage iine and in.

Specificatidn. of Reissued'Letters Patent. fieis gutgidt Apr. 6, EQQ QB November 20, 1917, Serial No. 140,594, filed January l,

reissue filed May 16, 1919. Serial No. 297,668.

1917 Application for sponding parts in all of the figures of the drawings.

- The hub or sinker is a tool made in the shape of the article that is to be stamped out by the finished die. block of which the die is to be made heated to the proper temperature and. the huin or sinker is forced or driven into it'leavingan impression the shape of the hub or sinkein.

Heretofore it has been customary to force the hub or sinker into the block of steel to a. depth determined more, or less by guess work and then dress off the top of the, die block to secure an impression of the proper depth. .Vith the hubs or sinkers heretofore employed it has been difficult to secure sharp edges at the upper face of the die. employment of the hub or sinker constitutmg the present invention sharp edges are secured at the upper face of the I indications areformed upon the upper "face of thedie block Wiii indicate to the worizman the exactpoint to which the top of the. die block is .to he finished.

Referring to the accompanying" drawings 5 designates a sultable metal block having formed in cameo upon one of its faces In making the die, the.

By the die and such are suitable shape or pattern such as is indi-, l

cated at 6, and which shape, when driven into a heated block of metai A from which the die is to he formed, is adapted to pro duce an impression or cavity a therein which corresponds to the coi'ifiguration of the shape.

The present; invention resides perticuiarly in forming s h 7' around the base portion of the shape 6, which ledge tially conforms to tne configuration of the i shape and this lodge is separated fI'OlliiihG shape by a preferably continuous gutter 8. The ledge 7 and the gutter 8 are formed in the block 5 at the base of the shape 6, with the outer edge of the ledge 7, particularly for the purposes hereinafterdescribed, terminating in coinciding relation, with the center or base has of the adjacent portion of said shape, which center or base this is dotted. in the drawings and designated 9.

It wiil he understood that if the die is of.

the iocir type, illustrated in Figsfl and 2, the outer edge of the ledge? will follow and conform the irregiuar lock center or.

base line ofthe shape 6; Thecenter or base true of a hub or sinker is understood by manufacturers thereof as the imaginary line die when made and dressed off forms one of a pair of dies and the division or parting line therebetween is generallv referred to as the center line. The term center line, as used herein, Wlll therefore be understood as referring to the lmagmary base line of the "shape 6, which line coincides with the surface or parting line I of the finished or dressed-oft face of a die block when a hub or sinker is passed therein.

In operation, the presence of the gutter 8 in the hub or sinker permits the hot metal displaced on the surface of the block A at b by the hub or sinker ledge 7 to flow into said gutter and thus form a continuous slightly elei ted ridge aronnd the inipression formed intaglio in the die block A by the shape 6. For this purpose the outer Wallof the gutter 8 is preferahly inclined or extended away from the inner wall thereof to cause-a forcing of the displaced material toward the impression edge.

The ledge 7 in addition to serving as an element for displacing metal in the tace of the. die block A around the impression a and causing the displaced metal toflow around said impression to provide it with asharp well defined marginal edge. als acts as a marker to form the continuous recess or depression Z1 in the face of the die hlock around the outer side of the edge ridge 0, the bottom of such recess coinciding exactly with the center or parting line a of the formed impression, the same as the outer edge of the. ledge 7 in the huh or sinker block 5 coincides with the center line l) of the shape 6. The gage line tllllg formed in the face of the die hlock indicate to the mechanic the exact. depth to which he is to remove the superfluous metal from the die face. The ridge thrown up hy the action of the ledge or marker 7 t'orms av part of this superfluous metal and is removed therewith. The die with its face dressed shown in Fig. 8.

The provision ot the gage recess 7; in the die face to define the center or parting line of the die, is of very great importance in indicating to the mechanic the. clevalions nd de prcssions in the face of the die, especially where it is desired to produce dies ot' the lock or irregular surtace type. as this ohviates the tedious and highly killed work required in making the necessary templets. laying out the die tace outline, and la vin; out the out liiie on the side of the die block defining the;

depth of the impression in the block i'ireparatory to "facing oit the hlock; and alsoohviate the very accurate milling'machine manipulation required, to follow with'the pointer, the depth line of the hottom of the impression, which depth line is laid out on the side. of the block so that the tacing-olij' cut will. correspond to such line. For instance, in making the dies tor a pair'ot ordinary-eight inch shears by the old method it takes approximately 220 hours ot highly skilled labor, while. t make the dies with our improred method by which the exact center line or lock lineot the die. is designated, it take approXimatel 6 hours of labor, which need not necessarily he of a highly skilled nature. it being a. simple. matter to remove the superfluous metal from the die face. Vith our method the danger of mistakes and errors is also minimized.

Having descrihcd our invention, what we claim is 1. A huh or sinker, comprising hlock. a shape formed thereon, a lci'lge which pro jects above the taceo'l the hlock hut liLs he low the face oi" the shape. and a gutter formed between said ledge and said shape.

A hub or sinker of the class descrihed. comprising a clock having a paternal shape tonned thereon and a ledge surroiuiding said shape and torn'iing a gutter therehetween. said ledge hcingr o'li' less depth than said shape.

A. huh or sinker ot the class dcscrihed, comprising a hlock having a paternal shape or pattern thereon and a ledge surrournlinp the hase. portion ol said shape and Forming a gutter therehctween, the outer edge of said ledge hcin; coincident with the center line of the shape.

4. A. huh or iuker of the. lass described, comprising; a hlock having a paternal shape thereon and a ledge surroiuuling said shapehelow its outer taco and forming therewith a gutter, the. outer wall of which extends away from the shape.

5. A huh or sinker ot' the class described, compri. a hlock having a. paternal shape thereon and a ledge surroumling said shape with its outer edge terminating: in coincident relation to the center or partingg line of the shape entirely l'hm'earouml, said ledge coopcrating with the shape to Form a gutter thcrehetwccn. the outer wall oi" which extends away from the shape.

(3; A. huh .or sinker ot' the. class described,

having a shape or pattern and a ledge at the hase portion oi the shape, the latter to serve as a marker to leave an impression upon a die hlock to indicate the depth to which the. top of the die hlock is to he dressed-oil.

7. A huh or sinker ot' the class described,

havingr a. shape or'pattern and a ledge sur-,

rounding the haso portion of the shape, the latter to serve as a marker to indicate on a die hlock the depth to which the tare should spaced therefrom to its having a shape or pattern and a ledge at the base portion o the shape spaced there from to form a gutter therehetween and serving as a marker to leave an impression upon a die block to indicate the depth to which the top of the block has toloe dressed-- oil and to serve as a means to force some of thedisplaced metal inward around the edge of the base of the shape. 1

9. A hub orsinker of the class described,

having a shape or pattern and a ledge surrounding the hase portion of the shape and form a gutter therebetween and serving as a marker to leave an "impression upon a die block to indicate the depth ,towhich block is to be dressed-oil.

10. A hub or sinker of the class described, having a shape or pattern and a led e at the top of the die the base portion of the shape spaced there fromv to form a gutter, the outer wallet which extends away from the .inner Wall, said ledge serving as a marker to leave an impression-upon the die block to indicate the depth to which the top of the hloclr is to be dressed-off.

'11. A hub or-sinker of the class described, havin a shape or pattern and a ledge surrounding the base portion of the shape in spaced relation thereto to form an interposed gutter, the outer Wall of which e2;- tends away from the inner wall, the shape adapted to produce a die having a lock or irregular center line and said ledge terminating at the center line and conforming to the irregularities thereof and adapted to serve as a marker to leave an impression upon a die bloclr to indicate the depth, to wg iich the top of the block is to be 0.1-

12. The metlwd of forming dies, consist ing in forcing into a metal lilo-ck a hub or sinker to produce a die impression therein forming a marker impression at the side of the die impression to serve as a guide to indicate the depth to which the top oi? the die block .is to be dressed, and then removing the face of the block to a depth determined by the marker impression.

13. The method of forming dies, consisting in forcing into a metal. block a hub or sinker to produce a die lmpression thereln,

.111 the same operation forming amarker impression at the side of the die impresion to serve as a guide to indicate the depth to which the top of the the block is to be dressed, and then removir the face of the block to a depth determined by the marker impression.

14:. The method of forming dies, consistmg no. forc ng lnto a metal hloelt a hub or sinker to produce die impression therein,

impression at the side of the die impression to serve as guide to indicate the depth to which the top of the the block is to be dressed, and by the same operation forcing a part at least of the displaced metal in Ward to form a ridge around the edge of the die impression, and then removing the ridge and block face to a depth determined by the marker impression.

18. The method of forming dies, consist ing in forcing into a metal block a hub or sinker to produce. a die impression therein, by the same operation forming a marker impr 'ssion at the side "of the die im ression to serve as a guide to indicate the Cepth to which the top of the die block is to be dressed and forcing a part at least of the displaced metal inward to form a ridge around the edge of the die impression, and then removing the ridge and block face to a depth determined by the marker impres; sion.

17. The methodol forming dies, consisting in forcing into a hot metal block a hubblock is to be dressed, to suit the lock or' irregular center line the die impression, and then removing the face of the block to a depth determined hy the marker impression.

18. The method of forming dies, which consists in forcing into ahot metal block a hub or sinker to produce a die or impression therein having a loclr or irregular center line, in the same operation formii lg a marker impression at the side of the did impression to serve as a guide to indicate the depth to which the top of the die block is to be dressed, and. forcing a part or the displacedmetal inward to form a ridge at the edge of the die impression Without its center line, and then removing the face of the block to a depth determined by the marker impression.

In testimon ir whereof, We hereunto signed our names to specification.

ironies ores 

